when i extract with my method numerical values from excel, instead of 4.1, reads 4.09999999999999964472863211994990706443 and puts into my table

Question

I have recently met this problem. I have to read data from excel.xlsx and put into my table. The problem is when I read the value from cell, it changes. E.G. Data from excel is: 4.1 and was stored 4.09999999999999964472863211994990706443 . Cell Type is Numeric. Column is NUMBER. I have printed the value after I read it and the value is 4.09999999999999964472863211994990706443.

Get value class:

public static BigDecimal getValueAsBigDecimal(Workbook workbook, Sheet sheet, String columnIndex, int rowIndex) throws ParseException {
    String reference = decodeChacartersToDoubles(columnIndex) + rowIndex;
    CellReference cellReference = new CellReference(reference);
    Row row = sheet.getRow(cellReference.getRow());
    Cell cell = row.getCell(cellReference.getCol());

    if (cell.getCellType().equals(CellType.NUMERIC)) {
        return new BigDecimal(cell.getNumericCellValue());
    }
    if (cell.getCellType().equals(CellType.STRING)) {
        DataFormatter dataFormatter = new DataFormatter();
        return new BigDecimal(dataFormatter.formatCellValue(cell));
    }
    if (cell.getCellType().equals(CellType.FORMULA)) {
        FormulaEvaluator evaluator = workbook.getCreationHelper().createFormulaEvaluator();
        CellValue cellValue = evaluator.evaluate(cell);
        return new BigDecimal(cellValue.getNumberValue());
    }
    return null;

}